Concrete-insert



E. TOWE.

CONCRETE INSERT.

APPLICATION FILED JAN. 26, I920.

1,359,290; Pad tented Nov. 16, 0.

' HEETS-SH E. TOWE.

CONCRETE INSERT. A'ifPLICATION FILED MN. 26 I920.

Patented Nov. 16, 1920..

2 suans sman 2.

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terseting point of these lines representing the point at which the insert is to be centered and fastened to the bottom of the mold. In order to properly locate the nails that are to hold the insert in place at this point, the jig 9 is used. This jig comprises acircular disk which is provided with an opening 10 in thecenter and has a portion of the periphery cut away at diametrically opposite points as indicated at 11 and 12 in Fig. 2. Each of the cut-away portions 11 and 12 forms a small notch 13 at diametrically opposite points on the periphery of the disk. The jig is placed on the bottom of the mold so that the intersecting point of the lines 7 and 8 is centered in the opening 10 of the jig. A pair of nails 14 and 15 is then driven through the notches 13 into the bottom of the mold until the heads of these nails strike the top edge of the jig. The nails 14; and 15 thus driven. into the mold are thus properly spaced apart by the notchesin the jig andthe distance which they are allowed to project out from the bottom of the mold is gaged by the thickness of the jig and corresponds with the thickness of the flange 1 of the insert.

After the nailsfor fastening the insert have thus been properly located on the bottom of the mold, the jig is removed and the insert is placed over the nails in such a way that the nails 14 and 15 enter the notches 5 and 6 in the insert so as to allow these nails to projectinto the inside of the shell of the insert with the heads of the nails projectin' 'above the annular flange 4: thereof. The oblong or elliptical opening 3 in the bottom of the insert admits the insertion of the nails without any obstruction thereto and when thus inserted, allows the rotation .of the shell 1 which brings the nails in line with the short axis of the elliptical opening. In doing so, the sidesof the opening are brought close to the sides of the nails and the heads thereof overhang the edges of the flanges 4. In order to allow the shanks of the nails to center themselves at the narrowest point of the opening 3 a pair of notches l6 and 17.are provided in the flanges 4 at this point and when the nails 14 and 15 are in line with these notches they are adapted to spring into them and the shell 1 will be held in place on the nails.

The overhanging portion of the heads of the nails, together with the close fitting of the shanks of the nails to the sides of the flanges 4, operates to securely fasten the insert to the bottom of the mold of the ceiling and the concrete may then be poured around it without danger of movin the inserts during the pouring operation.

When the concrete has set and the concrete is strong enou 'h to su ort itself, the

false work, including the bottom of the mold to which the insert had been attached, is removed. In doing this, the nails that held the insert in place on the mold, are pulled p out from the wood and as soon as the wood is removed these nails will fall out from the insert. The bottom of the insert will then be free and unobstructed so that the anchor plate 18 can be inserted therein and suitable hangers suspended therefrom.

The anchor plate 18 consists of a plate having a slot extending from one side thereof about three-quarters of the way across the plate. Surrounding this slot is the flange 19. The plate 18 is intended to hold a bolt or other support and the flange on the plate is intended to engage with the head of the bolt or the nut and prevent it from turning on the plate and its slot. The plate 18 is insertedinto the insert by first engaging the bolt with the plate and then passing the plate edgewise through the notches 6 and 7 in the manner shown in dotted lines in Fig.6 until it is onthe inside of the insert. The plate is then turned to a horizontal position and allowed to rest on the flanges 4:.

The flange 4 is provided with the serrations 20 as indicated in Figs. 8 to 7, inclusive, and the plate 18 is provided with corresponding teeth at the bottom side thereof to engage these serrations in any desired position in which the plate is to rest in the insert. By lifting the plate, the position may be shifted to any other position in which it will be held in place as soon asthe plate is again allowed to rest on the flange at. In this way the slot can be made to point in any direction. 7

The bolt can be placed at any place along the slot in the plate which means that it can be located in the center of the shell as well as' at any point between the center and the periphery of the plate.

The conical shell 1 is held best in the concrete when its sides have an inclination of about 20.

I claim:

1. In a concrete insert, the combination of an inverted conical shell, said shell being open at the bottom and closed at the top, said open bottom being provided with a pair of curved flanges, said curved flanges being eccentric to the openingin the bottom in said shell, a pair of notches located diametrically opposite each other in the bottom and separatingsaid flanges.

2. In a concrete insert, the combination of an inverted conical shell, said shell being closed at the top and having an elliptical opening at the bottom, a flange surrounding said opening, said flange having a pair of notches cut into it diametrically V opposite each other and in line withthe long axis of the elliptical opening.

3. In a concrete insert the combination of a conical shell, a pair of curved flanges with said flanges loosely embracing the at one end of said shell extending inwardly nails, said shell being adapted to be turned 10 thereof, said curved flanges being eccentric around the nails to have the heads OI" the to the inside wall of said shell, an anchor nails project over said curved flanges in plate adapted to be inserted between said order to hold said shell in place thereby. flanges into the inside of said shell to be In testimony whereof I aflix my signasupported by said flanges, said shell being ture.

adapted to be passed over a pair of nails EDWARD TOWE. 

